Mercurial > hg
view tests/test-revlog-raw.py @ 43252:32187ae9eeb3
copies: simplify the handling of merges
Instead of stacking copies for both parent on the head, we move copies outside
of the heap into a dedicated dictionary. The two side of merge can we merged
sooner, making the algorithm simpler.
This simplicity reflect in the heap structure and speed up the execution for
copies involving a large amount of merges.
Here are timing for perfpathcopies of multiple revision pairs.
- filelog: timing using filelog (with the introrev condition dropped)
- base: this series base
- before: the parent of this changeset
- after: this changeset
revision: large amount; added files: large amount; rename small amount; c3b14617fbd7 9ba6ab77fd29
filelog: ! wall 3.679613 comb 3.680000 user 3.580000 sys 0.100000 (median of 3)
base: ! wall 8.884369 comb 8.880000 user 8.850000 sys 0.030000 (median of 3)
before: ! wall 8.443747 comb 8.420000 user 8.410000 sys 0.010000 (median of 3)
after: ! wall 4.697917 comb 4.690000 user 4.660000 sys 0.030000 (median of 3)
revision: large amount; added files: small amount; rename small amount; c3b14617fbd7 f650a9b140d2
filelog: ! wall 0.003357 comb 0.010000 user 0.010000 sys 0.000000 (median of 781)
base: ! wall 12.398524 comb 12.400000 user 12.330000 sys 0.070000 (median of 3)
before: ! wall 10.852593 comb 10.850000 user 10.800000 sys 0.050000 (median of 3)
after: ! wall 6.750832 comb 6.750000 user 6.640000 sys 0.110000 (median of 3)
revision: large amount; added files: large amount; rename large amount; 08ea3258278e d9fa043f30c0
filelog: ! wall 2.754687 comb 2.760000 user 2.650000 sys 0.110000 (median of 4)
base: ! wall 1.423166 comb 1.420000 user 1.400000 sys 0.020000 (median of 8)
before: ! wall 1.068041 comb 1.060000 user 1.050000 sys 0.010000 (median of 10)
after: ! wall 1.045916 comb 1.050000 user 1.040000 sys 0.010000 (median of 10)
revision: small amount; added files: large amount; rename large amount; df6f7a526b60 a83dc6a2d56f
filelog: ! wall 1.552293 comb 1.550000 user 1.510000 sys 0.040000 (median of 6
base: ! wall 0.022662 comb 0.020000 user 0.020000 sys 0.000000 (median of 128)
before: ! wall 0.021111 comb 0.020000 user 0.020000 sys 0.000000 (median of 139)
after: ! wall 0.021577 comb 0.020000 user 0.020000 sys 0.000000 (median of 138)
revision: small amount; added files: large amount; rename small amount; 4aa4e1f8e19a 169138063d63
filelog: ! wall 1.500983 comb 1.500000 user 1.420000 sys 0.080000 (median of 7)
base: ! wall 0.006956 comb 0.010000 user 0.010000 sys 0.000000 (median of 392)
before: ! wall 0.004356 comb 0.010000 user 0.010000 sys 0.000000 (median of 675)
after: ! wall 0.004329 comb 0.000000 user 0.000000 sys 0.000000 (median of 682)
revision: small amount; added files: small amount; rename small amount; 4bc173b045a6 964879152e2e
filelog: ! wall 0.011745 comb 0.020000 user 0.020000 sys 0.000000 (median of 250)
base: ! wall 0.000156 comb 0.000000 user 0.000000 sys 0.000000 (median of 17180)
before: ! wall 0.000100 comb 0.000000 user 0.000000 sys 0.000000 (median of 26912)
after: ! wall 0.000105 comb 0.000000 user 0.000000 sys 0.000000 (median of 25689)
revision: medium amount; added files: large amount; rename medium amount; c95f1ced15f2 2c68e87c3efe
filelog: ! wall 3.228230 comb 3.230000 user 3.110000 sys 0.120000 (median of 4)
base: ! wall 0.997640 comb 1.000000 user 0.980000 sys 0.020000 (median of 10)
before: ! wall 0.778291 comb 0.780000 user 0.780000 sys 0.000000 (median of 13)
after: ! wall 0.706594 comb 0.710000 user 0.710000 sys 0.000000 (median of 15)
revision: medium amount; added files: medium amount; rename small amount; d343da0c55a8 d7746d32bf9d
filelog: ! wall 1.052501 comb 1.060000 user 1.040000 sys 0.020000 (median of 10
base: ! wall 0.214519 comb 0.220000 user 0.220000 sys 0.000000 (median of 45)
before: ! wall 0.160804 comb 0.160000 user 0.160000 sys 0.000000 (median of 62)
after: ! wall 0.163736 comb 0.160000 user 0.160000 sys 0.000000 (median of 60)
Differential Revision: https://phab.mercurial-scm.org/D7069
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Wed, 02 Oct 2019 13:43:27 -0400 |
parents | 2372284d9457 |
children | 9d2b2df2c2ba |
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# test revlog interaction about raw data (flagprocessor) from __future__ import absolute_import, print_function import collections import hashlib import sys from mercurial import ( encoding, node, revlog, transaction, vfs, ) from mercurial.revlogutils import ( deltas, flagutil, ) # TESTTMP is optional. This makes it convenient to run without run-tests.py tvfs = vfs.vfs(encoding.environ.get(b'TESTTMP', b'/tmp')) # Enable generaldelta otherwise revlog won't use delta as expected by the test tvfs.options = { b'generaldelta': True, b'revlogv1': True, b'sparse-revlog': True, } # The test wants to control whether to use delta explicitly, based on # "storedeltachains". revlog.revlog._isgooddeltainfo = lambda self, d, textlen: self._storedeltachains def abort(msg): print('abort: %s' % msg) # Return 0 so run-tests.py could compare the output. sys.exit() # Register a revlog processor for flag EXTSTORED. # # It simply prepends a fixed header, and replaces '1' to 'i'. So it has # insertion and replacement, and may be interesting to test revlog's line-based # deltas. _extheader = b'E\n' def readprocessor(self, rawtext): # True: the returned text could be used to verify hash text = rawtext[len(_extheader) :].replace(b'i', b'1') return text, True, {} def writeprocessor(self, text, sidedata): # False: the returned rawtext shouldn't be used to verify hash rawtext = _extheader + text.replace(b'1', b'i') return rawtext, False def rawprocessor(self, rawtext): # False: do not verify hash. Only the content returned by "readprocessor" # can be used to verify hash. return False flagutil.addflagprocessor( revlog.REVIDX_EXTSTORED, (readprocessor, writeprocessor, rawprocessor) ) # Utilities about reading and appending revlog def newtransaction(): # A transaction is required to write revlogs report = lambda msg: None return transaction.transaction(report, tvfs, {'plain': tvfs}, b'journal') def newrevlog(name=b'_testrevlog.i', recreate=False): if recreate: tvfs.tryunlink(name) rlog = revlog.revlog(tvfs, name) return rlog def appendrev(rlog, text, tr, isext=False, isdelta=True): '''Append a revision. If isext is True, set the EXTSTORED flag so flag processor will be used (and rawtext is different from text). If isdelta is True, force the revision to be a delta, otherwise it's full text. ''' nextrev = len(rlog) p1 = rlog.node(nextrev - 1) p2 = node.nullid if isext: flags = revlog.REVIDX_EXTSTORED else: flags = revlog.REVIDX_DEFAULT_FLAGS # Change storedeltachains temporarily, to override revlog's delta decision rlog._storedeltachains = isdelta try: rlog.addrevision(text, tr, nextrev, p1, p2, flags=flags) return nextrev except Exception as ex: abort('rev %d: failed to append: %s' % (nextrev, ex)) finally: # Restore storedeltachains. It is always True, see revlog.__init__ rlog._storedeltachains = True def addgroupcopy(rlog, tr, destname=b'_destrevlog.i', optimaldelta=True): '''Copy revlog to destname using revlog.addgroup. Return the copied revlog. This emulates push or pull. They use changegroup. Changegroup requires repo to work. We don't have a repo, so a dummy changegroup is used. If optimaldelta is True, use optimized delta parent, so the destination revlog could probably reuse it. Otherwise it builds sub-optimal delta, and the destination revlog needs more work to use it. This exercises some revlog.addgroup (and revlog._addrevision(text=None)) code path, which is not covered by "appendrev" alone. ''' class dummychangegroup(object): @staticmethod def deltachunk(pnode): pnode = pnode or node.nullid parentrev = rlog.rev(pnode) r = parentrev + 1 if r >= len(rlog): return {} if optimaldelta: deltaparent = parentrev else: # suboptimal deltaparent deltaparent = min(0, parentrev) if not rlog.candelta(deltaparent, r): deltaparent = -1 return { b'node': rlog.node(r), b'p1': pnode, b'p2': node.nullid, b'cs': rlog.node(rlog.linkrev(r)), b'flags': rlog.flags(r), b'deltabase': rlog.node(deltaparent), b'delta': rlog.revdiff(deltaparent, r), } def deltaiter(self): chain = None for chunkdata in iter(lambda: self.deltachunk(chain), {}): node = chunkdata[b'node'] p1 = chunkdata[b'p1'] p2 = chunkdata[b'p2'] cs = chunkdata[b'cs'] deltabase = chunkdata[b'deltabase'] delta = chunkdata[b'delta'] flags = chunkdata[b'flags'] chain = node yield (node, p1, p2, cs, deltabase, delta, flags) def linkmap(lnode): return rlog.rev(lnode) dlog = newrevlog(destname, recreate=True) dummydeltas = dummychangegroup().deltaiter() dlog.addgroup(dummydeltas, linkmap, tr) return dlog def lowlevelcopy(rlog, tr, destname=b'_destrevlog.i'): '''Like addgroupcopy, but use the low level revlog._addrevision directly. It exercises some code paths that are hard to reach easily otherwise. ''' dlog = newrevlog(destname, recreate=True) for r in rlog: p1 = rlog.node(r - 1) p2 = node.nullid if r == 0 or (rlog.flags(r) & revlog.REVIDX_EXTSTORED): text = rlog.rawdata(r) cachedelta = None else: # deltaparent cannot have EXTSTORED flag. deltaparent = max( [-1] + [ p for p in range(r) if rlog.flags(p) & revlog.REVIDX_EXTSTORED == 0 ] ) text = None cachedelta = (deltaparent, rlog.revdiff(deltaparent, r)) flags = rlog.flags(r) ifh = dfh = None try: ifh = dlog.opener(dlog.indexfile, b'a+') if not dlog._inline: dfh = dlog.opener(dlog.datafile, b'a+') dlog._addrevision( rlog.node(r), text, tr, r, p1, p2, flags, cachedelta, ifh, dfh ) finally: if dfh is not None: dfh.close() if ifh is not None: ifh.close() return dlog # Utilities to generate revisions for testing def genbits(n): '''Given a number n, generate (2 ** (n * 2) + 1) numbers in range(2 ** n). i.e. the generated numbers have a width of n bits. The combination of two adjacent numbers will cover all possible cases. That is to say, given any x, y where both x, and y are in range(2 ** n), there is an x followed immediately by y in the generated sequence. ''' m = 2 ** n # Gray Code. See https://en.wikipedia.org/wiki/Gray_code gray = lambda x: x ^ (x >> 1) reversegray = dict((gray(i), i) for i in range(m)) # Generate (n * 2) bit gray code, yield lower n bits as X, and look for # the next unused gray code where higher n bits equal to X. # For gray codes whose higher bits are X, a[X] of them have been used. a = [0] * m # Iterate from 0. x = 0 yield x for i in range(m * m): x = reversegray[x] y = gray(a[x] + x * m) & (m - 1) assert a[x] < m a[x] += 1 x = y yield x def gentext(rev): '''Given a revision number, generate dummy text''' return b''.join(b'%d\n' % j for j in range(-1, rev % 5)) def writecases(rlog, tr): '''Write some revisions interested to the test. The test is interested in 3 properties of a revision: - Is it a delta or a full text? (isdelta) This is to catch some delta application issues. - Does it have a flag of EXTSTORED? (isext) This is to catch some flag processor issues. Especially when interacted with revlog deltas. - Is its text empty? (isempty) This is less important. It is intended to try to catch some careless checks like "if text" instead of "if text is None". Note: if flag processor is involved, raw text may be not empty. Write 65 revisions. So that all combinations of the above flags for adjacent revisions are covered. That is to say, len(set( (r.delta, r.ext, r.empty, (r+1).delta, (r+1).ext, (r+1).empty) for r in range(len(rlog) - 1) )) is 64. Where "r.delta", "r.ext", and "r.empty" are booleans matching properties mentioned above. Return expected [(text, rawtext)]. ''' result = [] for i, x in enumerate(genbits(3)): isdelta, isext, isempty = bool(x & 1), bool(x & 2), bool(x & 4) if isempty: text = b'' else: text = gentext(i) rev = appendrev(rlog, text, tr, isext=isext, isdelta=isdelta) # Verify text, rawtext, and rawsize if isext: rawtext = writeprocessor(None, text, {})[0] else: rawtext = text if rlog.rawsize(rev) != len(rawtext): abort('rev %d: wrong rawsize' % rev) if rlog.revision(rev, raw=False) != text: abort('rev %d: wrong text' % rev) if rlog.rawdata(rev) != rawtext: abort('rev %d: wrong rawtext' % rev) result.append((text, rawtext)) # Verify flags like isdelta, isext work as expected # isdelta can be overridden to False if this or p1 has isext set if bool(rlog.deltaparent(rev) > -1) and not isdelta: abort('rev %d: isdelta is unexpected' % rev) if bool(rlog.flags(rev)) != isext: abort('rev %d: isext is ineffective' % rev) return result # Main test and checking def checkrevlog(rlog, expected): '''Check if revlog has expected contents. expected is [(text, rawtext)]''' # Test using different access orders. This could expose some issues # depending on revlog caching (see revlog._cache). for r0 in range(len(rlog) - 1): r1 = r0 + 1 for revorder in [[r0, r1], [r1, r0]]: for raworder in [[True], [False], [True, False], [False, True]]: nlog = newrevlog() for rev in revorder: for raw in raworder: if raw: t = nlog.rawdata(rev) else: t = nlog.revision(rev) if t != expected[rev][int(raw)]: abort( 'rev %d: corrupted %stext' % (rev, raw and 'raw' or '') ) slicingdata = [ ([0, 1, 2, 3, 55, 56, 58, 59, 60], [[0, 1], [2], [58], [59, 60]], 10), ([0, 1, 2, 3, 55, 56, 58, 59, 60], [[0, 1], [2], [58], [59, 60]], 10), ( [-1, 0, 1, 2, 3, 55, 56, 58, 59, 60], [[-1, 0, 1], [2], [58], [59, 60]], 10, ), ] def slicingtest(rlog): oldmin = rlog._srmingapsize try: # the test revlog is small, we remove the floor under which we # slicing is diregarded. rlog._srmingapsize = 0 for item in slicingdata: chain, expected, target = item result = deltas.slicechunk(rlog, chain, targetsize=target) result = list(result) if result != expected: print('slicing differ:') print(' chain: %s' % chain) print(' target: %s' % target) print(' expected: %s' % expected) print(' result: %s' % result) finally: rlog._srmingapsize = oldmin def md5sum(s): return hashlib.md5(s).digest() def _maketext(*coord): """create piece of text according to range of integers The test returned use a md5sum of the integer to make it less compressible""" pieces = [] for start, size in coord: num = range(start, start + size) p = [md5sum(b'%d' % r) for r in num] pieces.append(b'\n'.join(p)) return b'\n'.join(pieces) + b'\n' data = [ _maketext((0, 120), (456, 60)), _maketext((0, 120), (345, 60)), _maketext((0, 120), (734, 60)), _maketext((0, 120), (734, 60), (923, 45)), _maketext((0, 120), (734, 60), (234, 45)), _maketext((0, 120), (734, 60), (564, 45)), _maketext((0, 120), (734, 60), (361, 45)), _maketext((0, 120), (734, 60), (489, 45)), _maketext((0, 120), (123, 60)), _maketext((0, 120), (145, 60)), _maketext((0, 120), (104, 60)), _maketext((0, 120), (430, 60)), _maketext((0, 120), (430, 60), (923, 45)), _maketext((0, 120), (430, 60), (234, 45)), _maketext((0, 120), (430, 60), (564, 45)), _maketext((0, 120), (430, 60), (361, 45)), _maketext((0, 120), (430, 60), (489, 45)), _maketext((0, 120), (249, 60)), _maketext((0, 120), (832, 60)), _maketext((0, 120), (891, 60)), _maketext((0, 120), (543, 60)), _maketext((0, 120), (120, 60)), _maketext((0, 120), (60, 60), (768, 30)), _maketext((0, 120), (60, 60), (260, 30)), _maketext((0, 120), (60, 60), (450, 30)), _maketext((0, 120), (60, 60), (361, 30)), _maketext((0, 120), (60, 60), (886, 30)), _maketext((0, 120), (60, 60), (116, 30)), _maketext((0, 120), (60, 60), (567, 30), (629, 40)), _maketext((0, 120), (60, 60), (569, 30), (745, 40)), _maketext((0, 120), (60, 60), (777, 30), (700, 40)), _maketext((0, 120), (60, 60), (618, 30), (398, 40), (158, 10)), ] def makesnapshot(tr): rl = newrevlog(name=b'_snaprevlog3.i', recreate=True) for i in data: appendrev(rl, i, tr) return rl snapshots = [-1, 0, 6, 8, 11, 17, 19, 21, 25, 30] def issnapshottest(rlog): result = [] if rlog.issnapshot(-1): result.append(-1) for rev in rlog: if rlog.issnapshot(rev): result.append(rev) if snapshots != result: print('snapshot differ:') print(' expected: %s' % snapshots) print(' got: %s' % result) snapshotmapall = {0: [6, 8, 11, 17, 19, 25], 8: [21], -1: [0, 30]} snapshotmap15 = {0: [17, 19, 25], 8: [21], -1: [30]} def findsnapshottest(rlog): resultall = collections.defaultdict(list) deltas._findsnapshots(rlog, resultall, 0) resultall = dict(resultall.items()) if resultall != snapshotmapall: print('snapshot map differ:') print(' expected: %s' % snapshotmapall) print(' got: %s' % resultall) result15 = collections.defaultdict(list) deltas._findsnapshots(rlog, result15, 15) result15 = dict(result15.items()) if result15 != snapshotmap15: print('snapshot map differ:') print(' expected: %s' % snapshotmap15) print(' got: %s' % result15) def maintest(): with newtransaction() as tr: rl = newrevlog(recreate=True) expected = writecases(rl, tr) checkrevlog(rl, expected) print('local test passed') # Copy via revlog.addgroup rl1 = addgroupcopy(rl, tr) checkrevlog(rl1, expected) rl2 = addgroupcopy(rl, tr, optimaldelta=False) checkrevlog(rl2, expected) print('addgroupcopy test passed') # Copy via revlog.clone rl3 = newrevlog(name=b'_destrevlog3.i', recreate=True) rl.clone(tr, rl3) checkrevlog(rl3, expected) print('clone test passed') # Copy via low-level revlog._addrevision rl4 = lowlevelcopy(rl, tr) checkrevlog(rl4, expected) print('lowlevelcopy test passed') slicingtest(rl) print('slicing test passed') rl5 = makesnapshot(tr) issnapshottest(rl5) print('issnapshot test passed') findsnapshottest(rl5) print('findsnapshot test passed') try: maintest() except Exception as ex: abort('crashed: %s' % ex)